package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {
    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private DishMapper dishMapper;

    @Override
    public void add(ShoppingCartDTO shoppingCartDTO) {
        //添加购物车核心逻辑提前判断改商品是否存在购物车然后在进一步考虑如何添加

        Long userId = BaseContext.getCurrentId();
        //判断添加是菜品还是套餐
        ShoppingCart shoppingCart = new ShoppingCart();
        //这种辅助更加灵活不用写两次
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        //这种写法直接服用很强
        //一可以查询当前用户所有购物车
        //二还可以查询改用户买具体套餐或菜品购物车
        List<ShoppingCart> list=shoppingCartMapper.list(shoppingCart);
        //这里有细节同一个菜品不同口味也算不同购物车
        if(list!=null&&list.size()>0){
            //改套餐或商品存在
            ShoppingCart shoppingCart1 = list.get(0);
            shoppingCart1.setNumber(shoppingCart1.getNumber()+1);
            shoppingCartMapper.updateNumberById(shoppingCart1);
        }else{
            //不存在
            //具体判断加入菜品还是套餐了
            Long dishId = shoppingCartDTO.getDishId();
            Long setmealId = shoppingCartDTO.getSetmealId();
            if(setmealId!=null){
                //加入的是套餐
                //查询套餐复制即可
                Setmeal setmeal = setmealMapper.getById(setmealId);
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
                shoppingCart.setNumber(1);
                shoppingCart.setCreateTime(LocalDateTime.now());

            }else{
                //加入是菜品
                DishVO dishVO = dishMapper.getById(dishId);
                Dish dish = new Dish();
                BeanUtils.copyProperties(dishVO,dish);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
                shoppingCart.setNumber(1);
                shoppingCart.setCreateTime(LocalDateTime.now());
            }

            shoppingCartMapper.insert(shoppingCart);

        }


    }


    @Override
    public List<ShoppingCart> list() {
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> list=shoppingCartMapper.list(shoppingCart);
        return list;
    }

    @Override
    public void deleteAll() {
        shoppingCartMapper.deleteAll(BaseContext.getCurrentId());
    }

    @Override
    public void sub(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        if(list!=null&&list.size()>0){
            ShoppingCart shoppingCart1 = list.get(0);
            int number = shoppingCart1.getNumber() - 1;
            if(number>0){
                shoppingCart1.setNumber(number);
                shoppingCartMapper.updateNumberById(shoppingCart1);
            }else{
                shoppingCartMapper.deleteById(shoppingCart1.getId());
            }
        }
    }
}
